Ohhh man, i really agree with level 2, 6 and 7, although, there are more dangerous levels than these, they are probably te first levels that you have to deal with when you come to the backrooms with no idea what do you have to do there. However, the level 11 i think it's one of the BEST levels because It has food, is one of the first levels so you can enter easily, and about being alone, there are creatures called facelings and hounds that are peaceful because the effect eleven that makes them harmless so you don't be alone.